EP3768527B1 - Vehicle pneumatic tyre - Google Patents

Vehicle pneumatic tyre Download PDF

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Publication number
EP3768527B1
EP3768527B1 EP19701463.2A EP19701463A EP3768527B1 EP 3768527 B1 EP3768527 B1 EP 3768527B1 EP 19701463 A EP19701463 A EP 19701463A EP 3768527 B1 EP3768527 B1 EP 3768527B1
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EP
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Prior art keywords
hatching
ribs
pneumatic vehicle
vehicle tyre
tyre according
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EP19701463.2A
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German (de)
French (fr)
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EP3768527A1 (en
Inventor
Stefan Rittweger
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Continental Reifen Deutschland GmbH
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Continental Reifen Deutschland GmbH
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C13/00—Tyre sidewalls; Protecting, decorating, marking, or the like, thereof
    • B60C13/001—Decorating, marking or the like

Definitions

  • the invention relates to a pneumatic vehicle tire with side walls and with at least one hatched area or one hatched surface element on at least one side wall, the hatched area or the surface element having a multiplicity of hatched ribs running next to one another with two lateral flanks, one lateral flank of the hatched ribs having a surface finish has, which differs from that on the other side edge of the hatch ribs and wherein the surface finish of at least one side edge of the hatch ribs is a three-dimensional structure.
  • Hatched areas formed on the side walls of pneumatic vehicle tires primarily have the task of creating a contrast to existing smooth surface areas of the side walls in order to improve the legibility of lettering on the side walls, for example.
  • construction-related unevenness in the tire sidewalls can be concealed with hatched areas.
  • a three-dimensional effect of sheepskin surface elements is often also desirable, since true three-dimensional designs on side walls are not possible for reasons of tire uniformity.
  • a vehicle tire of the type mentioned is for example from JP 2009 143 488 A famous.
  • the pneumatic vehicle tire has side walls which are each provided with a circumferential hatched area.
  • the hatching areas are formed from a multiplicity of hatching ribs, which have a semicircular cross section and accordingly have two lateral flanks in the cross section, each running over a quarter of a circle.
  • One of the lateral flanks of each hatch rib is provided with grooves running in the longitudinal extent of the hatch rib, so that one lateral flank has a surface finish which differs from that of the other lateral flank.
  • Such hatched areas should conceal any bumps on the side walls particularly well.
  • EP 2 720 887 B1 discloses a pneumatic vehicle tire having sidewalls on which hatched areas of stem-shaped projections are formed, the stem-shaped projections being arranged at a density of at least five stems per square millimeter. Furthermore, at least two ribs run on each side wall, which traverse the pillar-shaped elevations of the hatched area and are therefore partially covered with the pillar-shaped elevations.
  • the JP 2014 061 820 A discloses a pneumatic vehicle tire with sidewalls having hatching areas with elevations having a trapezoidal cross section, elevations having a first trapezoidal cross section and elevations having a second trapezoidal cross section, which differs from the first trapezoidal cross section.
  • a pneumatic vehicle tire which has hatching areas on the side walls which comprise triangular hatching ribs in cross-section, the two lateral flanks of which are additionally structured with elongated conical or stalk-like projections.
  • the number of these projections is at least five per square millimeter, their average cross-sectional area is 0.003 mm 2 to 0.06 mm 2 .
  • the stalk-like projections are aligned parallel to each other and each have an average width of 0.03 mm to 0.10 mm and a height of at least 0.1 mm.
  • Further versions of hatching areas on side walls with hatching ribs running side by side are, for example, from EP 2 502 758 A1 and the DE 10 2008 010 486 A1 famous.
  • the invention is therefore based on the object of further improving hatching areas made of hatching ribs, in particular in order to achieve a particularly striking contrast effect and optical effects caused by light reflection and shadow formation, which are not possible with hatchings known hitherto.
  • the stated object is achieved according to the invention in that the three-dimensional structure covers the lateral flank of the respective hatching rib or in that the three-dimensional structure consists of a large number of additional ribs running parallel to one another and at right angles to the extent of the hatching ribs and having a width at their base of in particular 0, 1mm to 0.5mm.
  • hatching ribs designed according to the invention have lateral flanks that reflect light to different extents. Depending on the incidence of light and light intensity, this creates a particularly striking and optically advantageous contrast effect.
  • the different surface textures of the flanks of the ribs create shadow effects that, especially on the black rubber of the side walls, cause the hatching to be clearly emphasized compared to the surrounding surface areas.
  • a particularly good contrast effect which can be particularly clear depending on the incidence of light, can be achieved when designing the three-dimensional structure with the additional ribs.
  • the contrast effect of the hatching ribs that can be achieved through light absorption and light reflection compared to the other surface areas of the side wall is particularly clear in an embodiment in which, when hatching ribs running next to one another are observed, the flank having one surface finish is on one hatching rib of the flank having the other surface finish on the adjacent hatch rib faces.
  • a particularly effective, different upper texture of the two lateral flanks of the hatching ribs can be realized with preferred designs.
  • the two lateral flanks of the hatching ribs have different three-dimensional structures as the surface finish.
  • the three-dimensional structure that covers the lateral flank of the respective hatching rib consists of a large number of elevations and depressions, preferably formed directly next to one another, on the flanks of the hatching ribs in question, with the elevations and depressions having a height or depth of have in particular 0.5 mm to 0.8 mm.
  • the additional ribs can all be designed the same or at least of the same type and, viewed in cross section, be designed in particular triangular, trapezoidal or round and be arranged at mutual distances from one another or directly adjoin one another.
  • Preferred configurations of the hatching ribs include those in which the hatching ribs, viewed in cross section, are triangular, in particular isosceles triangular, or trapezoidal, in particular isosceles trapezoidal.
  • flanks of the hatching ribs viewed in cross section, preferably run at an angle of 5° to 60°, in particular at most 30°, to the side wall.
  • a different degree of light reflection is also achieved in a further special configuration of hatching areas in which hatching ribs are provided, which run at least in sections over local, in particular dome-like, projections which in particular have a height of 0.1 mm to 0.3 mm.
  • the sidewall of pneumatic vehicle tires usually contains the prescribed information, such as dimensions, the speed index, the manufacturer, the intended use (summer/winter tires) and the like. These indicia are found on smooth surface areas and are made up of raised elements in the rubber material of the side wall formed. However, some free space remains on the side walls of vehicle tires for hatching, which are formed from a large number of elevations and depressions and on the one hand make the contrast to the smooth surface areas in the side wall, on which the mentioned lettering is attached, clear and on the other hand any design-related Conceal unevenness on the side walls.
  • the hatchings are produced in the course of vulcanization by indentations formed in the mold parts or mold segments of the vulcanization mold. Depending on the type of hatching, these indentations are produced, in particular in a known manner, by milling processes and/or by means of laser engraving.
  • Figures 1 to 3 each show a section of a hatched area 1 or a surface element with hatching ribs 2 that are straight and parallel to one another and form basic hatching in the hatched area 1 .
  • the hatching ribs 2 can alternatively run in waves, arcs or the like and are either elevations that protrude beyond the level of the side wall surrounding the hatching area or elevations that run in a depression formed in the side wall and preferably do not protrude beyond the other level of the side wall.
  • the hatching ribs 2 are isosceles triangular, viewed in cross section, and have a structured side flank 3a forming one side of the triangle and a smooth or non-structured side side 3b forming the other side of the triangle. Therefore, one lateral flank 3a of the hatching ribs 2 has a surface finish which differs from that of the other lateral flank 3b of the hatching ribs 2 . According to Fig.
  • the hatching ribs 2 have a width b 1 of 0.1 mm to 0.7 mm at their base, furthermore a maximum height h 1 of 0.1 mm to 0.8 mm and one of the points with maximum height h 1 determined from one another mutual distance a 1 of 0.2 mm to 1.5 mm.
  • the lateral flanks 3a, 3b extend to the level of the hatched area 1 or to the side wall at the same angles ⁇ of 5° to 60°, preferably up to 45°, in particular of at most 30°.
  • the hatching ribs 2 are designed such that the structured lateral flank 3a of a hatching rib 2 faces the smooth lateral flank 3b of the hatching rib 2 running adjacent in each case.
  • the structured lateral flank 3a When executing according to 1 the structured lateral flank 3a is provided with an uneven structure 4, preferably coated, which gives the lateral flank 3a a roughness, ie an unevenness.
  • the structure 4 is composed, for example, of a large number of elevations and depressions which are formed in particular directly next to one another and whose height or depth varies in a range from 0.05 mm to 0.8 mm.
  • hatching ribs 2 run over locally formed projections 5, which are spaced apart from one another in the direction of extension of the hatching ribs 2 and are dome-like, in particular hemispherical, in the exemplary embodiment shown, which, for example, have a height h 2 of 0.1 mm to 0.3 mm, in particular from 0 .2 mm.
  • adjacent hatching ribs 2 can run over the same projections 5.
  • the projections 5 have mutual spacings of a few millimeters, for example 3.0 mm to 10.0 mm, in the direction in which the hatching ribs 5 extend.
  • FIG 3 shows an embodiment which differs from the embodiment according to FIG 1 differs in that a plurality of additional ribs 6 is placed on the structured lateral flank 3a of the hatching ribs 2 .
  • the additional ribs 6 run straight, also in a top view of the hatched area 1 perpendicular to the direction of extension of the hatched ribs 2 and in particular over the entire extent of the lateral flank 3a.
  • the additional ribs 6 in the exemplary embodiment shown, viewed in cross section are of isosceles triangular design and run at mutual distances from one another.
  • the additional ribs 6 can also be formed directly next to one another and have a different cross-sectional shape, for example round or semi-circular.
  • the additional ribs 6 At their base lying on the lateral flank 3a, the additional ribs 6 have a width b 2 of 0.1 mm to 0.5 mm.
  • Hatched ribs 2', 2" are described below, which are variants of the hatched rib 2, additional ribs 6 being provided as an example in the exemplary embodiments shown.
  • the height and width of the hatched ribs 2', 2" can correspond to the already mentioned height and width of the hatched ribs 2.
  • FIG. 4 shows two parallel hatching ribs 2' which are isosceles trapezoidal in cross-section and which--corresponding to their trapezoidal shape--have a plateau surface 3' with a width b 3 of 0.05 mm to 0.5 mm. Lateral flanks 3'a, 3'b forming trapezoidal legs adjoin the plateau surface 3' and run at an angle a of 5° to 60°, preferably up to 45°, in particular of at most 30°, to the side wall (not shown).
  • the hatching ribs 2" are provided with an asymmetrically triangular cross section, which in the example are each delimited by a structured lateral flank 3"a and a smooth lateral flank 3"b.
  • the structured lateral flank 3"a runs at an angle to the side wall ⁇ and the smooth lateral flank 3"b runs to the side wall at an angle ⁇ that differs from the angle ⁇ .
  • the angle ⁇ is 5° to 60°, the angle ⁇ is in particular at least 5° greater than the angle ⁇ Angle ⁇ is 10° to 30° larger than angle ⁇ .
  • the structured lateral flank can be structured as desired, for example with projections running in the manner of a lattice.
  • both flanks of the hatching ribs can be structured, with the structure on one flank differing from that on the other flank.
  • the variants shown or described can be combined with one another, the cross-sectional shape of the hatching ribs also being independent of the structures formed on the lateral flanks.
  • the areas between the hatch ribs can also be structured.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)

Description

Die Erfindung betrifft einen Fahrzeugluftreifen mit Seitenwänden und mit zumindest einer Schraffurfläche bzw. einem schraffierten Flächenelement auf zumindest einer Seitenwand, wobei die Schraffurfläche bzw. das Flächenelement eine Vielzahl von nebeneinander verlaufenden Schraffurrippen mit zwei seitlichen Flanken aufweist, wobei die eine seitliche Flanke der Schraffurrippen eine Oberflächenbeschaffenheit aufweist, welche sich von jener an der anderen seitlichen Flanke der Schraffurrippen unterscheidet und wobei Oberflächenbeschaffenheit zumindest einer seitlichen Flanke der Schraffurrippen eine dreidimensionale Struktur ist.The invention relates to a pneumatic vehicle tire with side walls and with at least one hatched area or one hatched surface element on at least one side wall, the hatched area or the surface element having a multiplicity of hatched ribs running next to one another with two lateral flanks, one lateral flank of the hatched ribs having a surface finish has, which differs from that on the other side edge of the hatch ribs and wherein the surface finish of at least one side edge of the hatch ribs is a three-dimensional structure.

Auf Seitenwänden von Fahrzeugluftreifen ausgebildete Schraffurflächen haben vorrangig die Aufgabe, einen Kontrast zu vorhandenen glatten Flächenbereichen der Seitenwände zu schaffen, um derart beispielsweise die Lesbarkeit von auf den Seitenwänden befindlichen Schriftzügen zu verbessern. Darüber hinaus lassen sich mit Schraffurflächen konstruktionsbedingte Unebenheiten in den Reifenseitenwänden kaschieren. Erwünscht ist oft auch eine dreidimensionale Wirkung von Schaffurflächenelementen, da echte dreidimensionale Gestaltungen an Seitenwänden aus Gründen der Uniformity des Reifens nicht möglich sind.Hatched areas formed on the side walls of pneumatic vehicle tires primarily have the task of creating a contrast to existing smooth surface areas of the side walls in order to improve the legibility of lettering on the side walls, for example. In addition, construction-related unevenness in the tire sidewalls can be concealed with hatched areas. A three-dimensional effect of sheepskin surface elements is often also desirable, since true three-dimensional designs on side walls are not possible for reasons of tire uniformity.

Ein Fahrzeugluftreifen der eingangs genannten Art ist beispielsweise aus der JP 2009 143 488 A bekannt. Der Fahrzeugluftreifen weist Seitenwände auf, welche jeweils mit einer umlaufenden Schraffurfläche versehen sind. Gemäß einem Ausführungsbeispiel sind die Schraffurflächen aus einer Vielzahl von Schraffurrippen gebildet, welche einen halbkreisförmigen Querschnitt und dementsprechend im Querschnitt zwei jeweils über einen Viertelkreis verlaufende seitliche Flanken aufweisen. Eine der seitlichen Flanken jeder Schraffurrippe ist mit in Längserstreckung der Schraffurrippe verlaufenden Rillen versehen, sodass die eine seitliche Flanke eine Oberflächenbeschaffenheit aufweist, welche sich von jener der anderen seitlichen Flanke unterscheidet. Solche Schraffurflächen sollen etwaige Unebenheiten auf den Seitenwände besonders gut kaschieren.A vehicle tire of the type mentioned is for example from JP 2009 143 488 A famous. The pneumatic vehicle tire has side walls which are each provided with a circumferential hatched area. According to one exemplary embodiment, the hatching areas are formed from a multiplicity of hatching ribs, which have a semicircular cross section and accordingly have two lateral flanks in the cross section, each running over a quarter of a circle. One of the lateral flanks of each hatch rib is provided with grooves running in the longitudinal extent of the hatch rib, so that one lateral flank has a surface finish which differs from that of the other lateral flank. Such hatched areas should conceal any bumps on the side walls particularly well.

Aus der EP 2 720 887 B1 ist ein Fahrzeugluftreifen mit Seitenwänden bekannt, auf welchen Schraffurflächen aus stängelförmigen Erhebungen ausgebildet sind, wobei die stängelförmigen Erhebungen in einer Dichte von mindestens fünf Stängel pro Quadratmillimeter angeordnet sind. Ferner verlaufen auf jeder Seitenwand zumindest zwei Rippen, welche die stängelförmigen Erhebungen der Schraffurfläche durchqueren und daher mit den stängelförmigen Erhebungen abschnittsweise bedeckt sind.From the EP 2 720 887 B1 discloses a pneumatic vehicle tire having sidewalls on which hatched areas of stem-shaped projections are formed, the stem-shaped projections being arranged at a density of at least five stems per square millimeter. Furthermore, at least two ribs run on each side wall, which traverse the pillar-shaped elevations of the hatched area and are therefore partially covered with the pillar-shaped elevations.

Die JP 2014 061 820 A offenbart einen Fahrzeugluftreifen mit Seitenwänden, welche Schraffurflächen mit im Querschnitt trapezförmigen Erhebungen aufweisen, wobei Erhebungen mit einem ersten trapezförmigen Querschnitt und Erhebungen mit einem zweiten trapezförmigen Querschnitt, welcher sich vom ersten trapezförmigen Querschnitt unterscheidet, vorgesehen sind.the JP 2014 061 820 A discloses a pneumatic vehicle tire with sidewalls having hatching areas with elevations having a trapezoidal cross section, elevations having a first trapezoidal cross section and elevations having a second trapezoidal cross section, which differs from the first trapezoidal cross section.

Aus der US 2014/021662 A1 ist ferner ein Fahrzeugluftreifen bekannt, welcher auf den Seitenwänden Schraffurflächen aufweist, die im Querschnitt dreieckige Schraffurrippen umfassen, deren beide seitliche Flanken zusätzlich mit langgestreckt kegelförmigen oder stängelartigen Vorsprüngen strukturiert sind. Die Anzahl dieser Vorsprünge beträgt zumindest fünf pro Quadratmillimeter, ihre mittlere Querschnittsfläche beträgt 0,003 mm2 bis 0,06 mm2. Die stängelartigen Vorsprünge sind parallel zueinander ausgerichtet und weisen jeweils eine mittlere Breite von 0,03 mm bis 0,10 mm und eine Höhe von mindestens 0,1 mm auf. Weitere Ausführungen von Schraffurflächen auf Seitenwänden mit nebeneinander verlaufenden Schraffurrippen sind beispielsweise aus der EP 2 502 758 A1 und der DE 10 2008 010 486 A1 bekannt.From the U.S. 2014/021662 A1 Furthermore, a pneumatic vehicle tire is known which has hatching areas on the side walls which comprise triangular hatching ribs in cross-section, the two lateral flanks of which are additionally structured with elongated conical or stalk-like projections. The number of these projections is at least five per square millimeter, their average cross-sectional area is 0.003 mm 2 to 0.06 mm 2 . The stalk-like projections are aligned parallel to each other and each have an average width of 0.03 mm to 0.10 mm and a height of at least 0.1 mm. Further versions of hatching areas on side walls with hatching ribs running side by side are, for example, from EP 2 502 758 A1 and the DE 10 2008 010 486 A1 famous.

Der Erfindung liegt daher die Aufgabe zugrunde, Schraffurflächen aus Schraffurrippen weiter zu verbessern, insbesondere um eine besonders auffallende Kontrastwirkung und durch Lichtreflexion und Schattenbildung verursachte optische Effekte zu erzielen, die mit den bislang bekannten Schraffuren nicht möglich sind.The invention is therefore based on the object of further improving hatching areas made of hatching ribs, in particular in order to achieve a particularly striking contrast effect and optical effects caused by light reflection and shadow formation, which are not possible with hatchings known hitherto.

Gelöst wird die gestellte Aufgabe erfindungsgemäß dadurch, dass die dreidimensionale Struktur die seitliche Flanke der jeweiligen Schraffurrippe überzieht oder dass die dreidimensionale Struktur aus einer Vielzahl von parallel zueinander und im rechten Winkel zur Erstreckung der Schraffurrippen verlaufenden Zusatzrippen mit einer Breite an ihrer Basis von insbesondere 0,1 mm bis 0,5 mm besteht.The stated object is achieved according to the invention in that the three-dimensional structure covers the lateral flank of the respective hatching rib or in that the three-dimensional structure consists of a large number of additional ribs running parallel to one another and at right angles to the extent of the hatching ribs and having a width at their base of in particular 0, 1mm to 0.5mm.

Da die Oberflächenbeschaffenheit der seitlichen Flanken der Schraffurrippen in unmittelbarem Zusammenhang mit der Lichtabsorptions-/ bzw. Lichtreflexionswirkung der seitlichen Flanken steht, weisen gemäß der Erfindung ausgebildete Schraffurrippen unterschiedlich stark lichtreflektierende seitliche Flanken auf. Dadurch wird je nach Lichteinfall und Lichtintensität eine besonders auffallende und optisch vorteilhafte Kontrastwirkung erzeugt. Zusätzlich erzeugt die unterschiedliche Oberflächenbeschaffenheit der Flanken der Rippen Schatteneffekte, die besonders auf dem schwarzen Gummi der Seitenwände ein deutliches Hervorheben der Schraffuren gegenüber den umgebenden Flächenbereichen bewirken.Since the surface quality of the lateral flanks of the hatching ribs is directly related to the light absorption or light reflection effect of the lateral flanks, hatching ribs designed according to the invention have lateral flanks that reflect light to different extents. Depending on the incidence of light and light intensity, this creates a particularly striking and optically advantageous contrast effect. In addition, the different surface textures of the flanks of the ribs create shadow effects that, especially on the black rubber of the side walls, cause the hatching to be clearly emphasized compared to the surrounding surface areas.

Eine besonders gute Kontrastwirkung, die je nach Lichteinfall besonders deutlich sein kann, lässt sich bei der Ausgestaltung der dreidimensionalen Struktur mit den Zusatzrippen erzielen. Es gibt daher Schraffurrippen mit zumindest an einer seitlichen Flanke zusätzlich aufgesetzten Rippen.A particularly good contrast effect, which can be particularly clear depending on the incidence of light, can be achieved when designing the three-dimensional structure with the additional ribs. There are therefore hatched ribs with ribs additionally attached at least on one lateral flank.

Besonders deutlich ist die durch Lichtabsorption und Lichtreflexion erzielbare Kontrastwirkung der Schraffurrippen gegenüber den sonstigen Flächenbereichen der Seitenwand bei einer Ausführung, bei welcher, wenn nebeneinander verlaufende Schraffurrippen betrachtet werden, die die eine Oberflächenbeschaffenheit aufweisende Flanke an der einen Schraffurrippe der die andere Oberflächenbeschaffenheit aufweisenden Flanke an der benachbarten Schraffurrippe zugewandt ist.The contrast effect of the hatching ribs that can be achieved through light absorption and light reflection compared to the other surface areas of the side wall is particularly clear in an embodiment in which, when hatching ribs running next to one another are observed, the flank having one surface finish is on one hatching rib of the flank having the other surface finish on the adjacent hatch rib faces.

Mit bevorzugten Ausführungen lässt sich eine besonders effektvolle, unterschiedliche Oberbeschaffenheit der beiden seitlichen Flanken der Schraffurrippen realisieren. Bei einer diesbezüglich besonders bevorzugten Ausführung weisen die beiden seitliche Flanken der Schraffurrippen als Oberflächenbeschaffenheit unterschiedliche dreidimensionale Strukturen auf.A particularly effective, different upper texture of the two lateral flanks of the hatching ribs can be realized with preferred designs. In an embodiment that is particularly preferred in this respect, the two lateral flanks of the hatching ribs have different three-dimensional structures as the surface finish.

Auch bezüglich der Ausgestaltung der dreidimensionalen Strukturen sind verschiedene Möglichkeiten offen, die je nach gewünschter Kontrastwirkung eingesetzt werden können. Bei einer bevorzugten Ausgestaltung besteht die dreidimensionale Struktur, welche die seitliche Flanke der jeweiligen Schraffurrippe überzieht, aus einer Vielzahl von vorzugsweise unmittelbar nebeneinander ausgebildeten Erhebungen und Vertiefungen an der bzw. den betreffenden Flanken der Schraffurrippen, wobei die Erhebungen und Vertiefungen eine Höhe bzw. Tiefe von insbesondere 0,5 mm bis 0,8 mm aufweisen.Various possibilities are also open with regard to the design of the three-dimensional structures, which can be used depending on the desired contrast effect. In a preferred embodiment, the three-dimensional structure that covers the lateral flank of the respective hatching rib consists of a large number of elevations and depressions, preferably formed directly next to one another, on the flanks of the hatching ribs in question, with the elevations and depressions having a height or depth of have in particular 0.5 mm to 0.8 mm.

Die Zusatzrippen können sämtlich gleich oder zumindest gleichartig ausgeführt sein und, im Querschnitt betrachtet, insbesondere dreieckig, trapezförmig oder rund ausgestaltet sein sowie unter gegenseitigen Abständen zueinander angeordnet sein oder unmittelbar aneinander anschließen.The additional ribs can all be designed the same or at least of the same type and, viewed in cross section, be designed in particular triangular, trapezoidal or round and be arranged at mutual distances from one another or directly adjoin one another.

Besonders deutlich ist die Kontrastwirkung bei Schraffurrippen, bei welchen jeweils die eine seitliche Flanke eine von Strukturen freie, glatte Fläche ist.The contrasting effect is particularly clear in the case of hatching ribs, in which one lateral flank is a smooth surface free of structures.

Bevorzugte Ausgestaltungen der Schraffurrippen umfassen solche, bei welchen die Schraffurrippen, im Querschnitt betrachtet, dreieckig, insbesondere gleichschenkelig dreieckig, oder trapezförmig, insbesondere gleichschenkelig trapezförmig, ausgeführt sind.Preferred configurations of the hatching ribs include those in which the hatching ribs, viewed in cross section, are triangular, in particular isosceles triangular, or trapezoidal, in particular isosceles trapezoidal.

Bevorzugt verlaufen die Flanken der Schraffurrippen, im Querschnitt betrachtet, unter einem Winkel von 5° bis 60°, insbesondere von höchstens 30°, zur Seitenwand.The flanks of the hatching ribs, viewed in cross section, preferably run at an angle of 5° to 60°, in particular at most 30°, to the side wall.

Besonders auffällige Kontraste lassen sich auch mit einer weiteren bevorzugten Ausführung erreichen, bei welcher die seitlichen Flanken der Schraffurrippen unter unterschiedlich großen Winkeln zur Seitenwand verlaufen, wobei der größere Winkel um insbesondere 5° bis 30° größer ist als der kleinere.Particularly striking contrasts can also be achieved with a further preferred embodiment, in which the side flanks of the hatching ribs run at different angles to the side wall, the larger angle being in particular 5° to 30° larger than the smaller one.

Eine unterschiedlich starke Lichtreflexion wird ferner bei einer weiteren speziellen Ausgestaltung von Schraffurflächen erreicht, in welchen Schraffurrippen vorgesehen sind, welche zumindest abschnittsweise über lokale, insbesondere kuppelartige Vorsprünge, welche insbesondere eine Höhe von 0,1 mm bis 0,3 mm aufweisen, verlaufen.A different degree of light reflection is also achieved in a further special configuration of hatching areas in which hatching ribs are provided, which run at least in sections over local, in particular dome-like, projections which in particular have a height of 0.1 mm to 0.3 mm.

Weitere Merkmale, Vorteile und Einzelheiten der Erfindung werden nun anhand der Zeichnung, die schematisch Ausführungsbeispiele der Erfindung darstellt, näher beschrieben. Dabei zeigen

  • Fig. 1 eine Ansicht von Schraffurrippen einer Schraffurfläche einer Seitenwand eines Fahrzeugluftreifens mit einer ersten Variante der Erfindung,
  • Fig. 1a einen Querschnitt durch die Schraffurrippen der Fig. 1,
  • Fig. 2 eine Ansicht von Schraffurrippen einer Schraffurfläche einer Seitenwand eines Fahrzeugluftreifens mit einer zweiten Variante der Erfindung,
  • Fig. 3 eine Ansicht von Schraffurrippen einer Schraffurfläche einer Seitenwand eines Fahrzeugluftreifens mit einer dritten Variante der Erfindung und
  • Fig. 4 und Fig. 5 jeweils weitere Ausführungen von Schraffurrippen im Querschnitt.
Further features, advantages and details of the invention will now be described in more detail with reference to the drawing, which schematically shows exemplary embodiments of the invention. show it
  • 1 a view of hatched ribs of a hatched area of a side wall of a pneumatic vehicle tire with a first variant of the invention,
  • Fig. 1a a cross-section through the hatching ribs of 1 ,
  • 2 a view of hatched ribs of a hatched area of a side wall of a pneumatic vehicle tire with a second variant of the invention,
  • 3 a view of hatched ribs of a hatched area of a side wall of a pneumatic vehicle tire with a third variant of the invention and
  • 4 and 5 further versions of hatching ribs in cross-section.

Auf der Seitenwand von Fahrzeugluftreifen sind üblicherweise die vorgeschriebenen Angaben, wie Dimensionsangaben, der Speedindex, der Hersteller, der Verwendungszweck (Sommer-/ Winterreifen) und dergleichen angegeben. Diese Angaben befinden sich auf glatten Flächenbereichen und sind aus erhabenen Elementen im Gummimaterial der Seitenwand ausgebildet. Es verbleibt jedoch einiges an Freifläche auf den Seitenwänden von Fahrzeugluftreifen für Schraffuren, welche aus einer Vielzahl von Erhebungen und Vertiefungen gebildet sind und einerseits den Kontrast zu den glatten Flächenbereichen in der Seitenwand, auf welchen die erwähnten Schriftzüge angebracht sind, deutlich machen und andererseits etwaige konstruktionsbedingte Unebenheiten an den Seitenwänden kaschieren. Die Schraffuren werden im Zuge der Vulkanisation durch in den Formteilen bzw. Formsegmenten der Vulkanisationsform ausgebildeten Vertiefungen erzeugt. Je nach Art der Schraffur werden diese Vertiefungen, insbesondere in bekannter Weise, durch Fräsverfahren und/oder mittels Lasergravur erzeugt.The sidewall of pneumatic vehicle tires usually contains the prescribed information, such as dimensions, the speed index, the manufacturer, the intended use (summer/winter tires) and the like. These indicia are found on smooth surface areas and are made up of raised elements in the rubber material of the side wall formed. However, some free space remains on the side walls of vehicle tires for hatching, which are formed from a large number of elevations and depressions and on the one hand make the contrast to the smooth surface areas in the side wall, on which the mentioned lettering is attached, clear and on the other hand any design-related Conceal unevenness on the side walls. The hatchings are produced in the course of vulcanization by indentations formed in the mold parts or mold segments of the vulcanization mold. Depending on the type of hatching, these indentations are produced, in particular in a known manner, by milling processes and/or by means of laser engraving.

Fig. 1 bis Fig. 3 zeigen jeweils einen Ausschnitt einer Schraffurfläche 1 bzw. eines Flächenelementes mit gerade sowie parallel zueinander verlaufenden Schraffurrippen 2, welche eine Basisschraffur in der Schraffurfläche 1 bilden. Die Schraffurrippen 2 können alternativ auch wellen-, bogenförmig oder dergleichen verlaufen und sind entweder das die Schraffurfläche umgebenden Niveau der Seitenwand überragende Erhebungen oder in einer in der Seitenwand ausgebildeten Vertiefung verlaufende, das sonstige Niveau der Seitenwand vorzugsweise nicht überragende Erhebungen. Figures 1 to 3 each show a section of a hatched area 1 or a surface element with hatching ribs 2 that are straight and parallel to one another and form basic hatching in the hatched area 1 . The hatching ribs 2 can alternatively run in waves, arcs or the like and are either elevations that protrude beyond the level of the side wall surrounding the hatching area or elevations that run in a depression formed in the side wall and preferably do not protrude beyond the other level of the side wall.

Bei den in Fig. 1 bis 3 gezeigten Ausführungsbeispielen sind die Schraffurrippen 2, im Querschnitt betrachtet, gleichschenkelig dreieckig und weisen eine den einen Schenkel des Dreieckes bildende strukturierte seitliche Flanke 3a und eine den anderen Schenkel des Dreieckes bildende glatte bzw. nicht strukturierte seitliche Flanke 3b auf. Es weist daher die eine seitliche Flanke 3a der Schraffurrippen 2 eine Oberflächenbeschaffenheit auf, welche sich von jener der anderen seitlichen Flanke 3b der Schraffurrippen 2 unterscheidet. Gemäß Fig. 1a weisen die Schraffurrippen 2 an ihrer Basis eine Breite b1 von 0,1 mm bis 0,7 mm, ferner eine maximale Höhe h1 von 0,1 mm bis 0,8 mm und voneinander einen von den Stellen mit maximaler Höhe h1 ermittelten gegenseitigen Abstand a1 von 0,2 mm bis 1,5 mm auf.At the in Figures 1 to 3 In the exemplary embodiments shown, the hatching ribs 2 are isosceles triangular, viewed in cross section, and have a structured side flank 3a forming one side of the triangle and a smooth or non-structured side side 3b forming the other side of the triangle. Therefore, one lateral flank 3a of the hatching ribs 2 has a surface finish which differs from that of the other lateral flank 3b of the hatching ribs 2 . According to Fig. 1a the hatching ribs 2 have a width b 1 of 0.1 mm to 0.7 mm at their base, furthermore a maximum height h 1 of 0.1 mm to 0.8 mm and one of the points with maximum height h 1 determined from one another mutual distance a 1 of 0.2 mm to 1.5 mm.

Die seitlichen Flanken 3a, 3b verlaufen zum Niveau der Schraffurfläche 1 bzw. zur Seitenwand unter übereinstimmenden Winkeln α von 5° bis 60°, vorzugsweise bis 45°, insbesondere von höchstens 30°. Die Schraffurrippen 2 sind derart ausgeführt, dass die strukturierte seitliche Flanke 3a einer Schraffurrippe 2 der glatten seitlichen Flanke 3b der jeweils benachbart verlaufenden Schraffurrippe 2 zugewandt ist.The lateral flanks 3a, 3b extend to the level of the hatched area 1 or to the side wall at the same angles α of 5° to 60°, preferably up to 45°, in particular of at most 30°. The hatching ribs 2 are designed such that the structured lateral flank 3a of a hatching rib 2 faces the smooth lateral flank 3b of the hatching rib 2 running adjacent in each case.

Bei der Ausführung gemäß Fig. 1 ist die strukturierte seitliche Flanke 3a mit einer ungleichmäßigen Struktur 4 versehen, vorzugsweise überzogen, welche der seitlichen Flanke 3a eine Rauheit, d.h. eine Unebenheit, verleiht. Die Struktur 4 setzt sich beispielsweise aus einer Vielzahl von insbesondere unmittelbar nebeneinander ausgebildeten Erhebungen und Vertiefungen zusammen, deren Höhe bzw. Tiefe in einem Bereich von 0,05 mm bis 0,8 mm variiert.When executing according to 1 the structured lateral flank 3a is provided with an uneven structure 4, preferably coated, which gives the lateral flank 3a a roughness, ie an unevenness. The structure 4 is composed, for example, of a large number of elevations and depressions which are formed in particular directly next to one another and whose height or depth varies in a range from 0.05 mm to 0.8 mm.

Die in Fig. 2 gezeigte Variante unterscheidet sich von jener gemäß Fig. 1 und 1a dadurch, dass einige Schraffurrippen 2 über in Erstreckungsrichtung der Schraffurrippen 2 voneinander beabstandete, lokal ausgebildete, im gezeigten Ausführungsbeispiel kuppelartige, insbesondere halbkugelförmige, Vorsprünge 5 verlaufen, welche beispielsweise eine Höhe h2 von 0,1 mm bis 0,3 mm, insbesondere von 0,2 mm, aufweisen. Wie in Fig. 2 gezeigt, können bei entsprechender Dimensionierung der Vorsprünge 5 einander benachbarte Schraffurrippen 2 über dieselben Vorsprünge 5 verlaufen. Die Vorsprünge 5 weisen in Erstreckungsrichtung der Schraffurrippen 5 gegenseitige Abstände von einigen Millimetern, beispielsweise 3,0 mm bis 10, 0 mm auf.In the 2 shown variant differs from that according to Figures 1 and 1a in that some hatching ribs 2 run over locally formed projections 5, which are spaced apart from one another in the direction of extension of the hatching ribs 2 and are dome-like, in particular hemispherical, in the exemplary embodiment shown, which, for example, have a height h 2 of 0.1 mm to 0.3 mm, in particular from 0 .2 mm. As in 2 shown, with appropriate dimensioning of the projections 5, adjacent hatching ribs 2 can run over the same projections 5. The projections 5 have mutual spacings of a few millimeters, for example 3.0 mm to 10.0 mm, in the direction in which the hatching ribs 5 extend.

Fig. 3 zeigt eine Ausführungsform, welche sich von der Ausführung gemäß Fig. 1 dadurch unterscheidet, dass auf der strukturierten seitlichen Flanke 3a der Schraffurrippen 2 eine Vielzahl von Zusatzrippen 6 aufgesetzt ist. Die Zusatzrippen 6 verlaufen gerade, ferner in Draufsicht auf die Schraffurfläche 1 senkrecht zur Erstreckungsrichtung der Schraffurrippen 2 sowie insbesondere über die gesamte Erstreckung der seitlichen Flanke 3a. Ferner sind die Zusatzrippen 6 beim gezeigten Ausführungsbeispiel, im Querschnitt betrachtet, gleichschenkelig dreieckig ausgebildet und verlaufen unter gegenseitigen Abständen zueinander. Die Zusatzrippen 6 können jedoch auch unmittelbar nebeneinander ausgebildet sein und eine andere Querschnittsform, etwa rund bzw. halbkreisförmig, aufweisen. An ihrer an der seitlichen Flanke 3a liegenden Basis weisen die Zusatzrippen 6 eine Breite b2 von 0,1 mm bis 0,5 mm auf. 3 shows an embodiment which differs from the embodiment according to FIG 1 differs in that a plurality of additional ribs 6 is placed on the structured lateral flank 3a of the hatching ribs 2 . The additional ribs 6 run straight, also in a top view of the hatched area 1 perpendicular to the direction of extension of the hatched ribs 2 and in particular over the entire extent of the lateral flank 3a. Furthermore, the additional ribs 6 in the exemplary embodiment shown, viewed in cross section, are of isosceles triangular design and run at mutual distances from one another. However, the additional ribs 6 can also be formed directly next to one another and have a different cross-sectional shape, for example round or semi-circular. At their base lying on the lateral flank 3a, the additional ribs 6 have a width b 2 of 0.1 mm to 0.5 mm.

Anhand der Fig. 4 und 5 werden nachfolgend Schraffurrippen 2', 2" beschrieben, welche Varianten der Schraffurrippe 2 sind, wobei bei den gezeigten Ausführungsbeispielen exemplarisch Zusatzrippen 6 vorgesehen sind. Höhe und Breite der Schraffurrippen 2', 2" können der bereits erwähnten Höhe und Breite der Schraffurrippen 2 entsprechen.Based on Figures 4 and 5 Hatched ribs 2', 2" are described below, which are variants of the hatched rib 2, additional ribs 6 being provided as an example in the exemplary embodiments shown. The height and width of the hatched ribs 2', 2" can correspond to the already mentioned height and width of the hatched ribs 2.

Fig. 4 zeigt zwei nebeneinander verlaufende, im Querschnitt gleichschenkelig trapezförmige Schraffurrippen 2', welche - entsprechend ihrer Trapezform - eine Plateaufläche 3' mit einer Breite b3 von 0,05 mm bis 0,5 mm aufweisen. An die Plateaufläche 3' schließen Trapezschenkel bildende seitliche Flanken 3'a, 3'b an, welche zur nicht gezeigten Seitenwand unter einem Winkel a von 5° bis 60°, vorzugsweise bis 45°, insbesondere von höchstens 30°, verlaufen. 4 shows two parallel hatching ribs 2' which are isosceles trapezoidal in cross-section and which--corresponding to their trapezoidal shape--have a plateau surface 3' with a width b 3 of 0.05 mm to 0.5 mm. Lateral flanks 3'a, 3'b forming trapezoidal legs adjoin the plateau surface 3' and run at an angle a of 5° to 60°, preferably up to 45°, in particular of at most 30°, to the side wall (not shown).

Bei der in Fig. 5 gezeigten Variante sind die Schraffurrippen 2" mit einem asymmetrisch dreieckigen Querschnitt vorgesehen, welche im Beispiel jeweils durch eine strukturierte seitliche Flanke 3"a und eine glatte seitliche Flanke 3"b begrenzt sind. Die strukturierte seitliche Flanke 3"a verläuft zur Seitenwand unter einem Winkel β und die glatte seitliche Flanke 3"b verläuft zur Seitenwand unter einem vom Winkel β abweichenden Winkel γ. Der Winkel β beträgt 5° bis 60°, der Winkel γ ist um insbesondere mindestens 5° größer als der Winkel β. Bevorzugter Weise ist der Winkel γ um 10° bis 30° größer als der Winkel β.At the in figure 5 In the variant shown, the hatching ribs 2" are provided with an asymmetrically triangular cross section, which in the example are each delimited by a structured lateral flank 3"a and a smooth lateral flank 3"b. The structured lateral flank 3"a runs at an angle to the side wall β and the smooth lateral flank 3"b runs to the side wall at an angle γ that differs from the angle β. The angle β is 5° to 60°, the angle γ is in particular at least 5° greater than the angle β Angle γ is 10° to 30° larger than angle β.

Die Erfindung ist auf die beschriebenen Ausführungsvarianten nicht beschränkt. Die strukturierte seitliche Flanke kann beliebig strukturiert sein, beispielsweise mit gitterartig verlaufenden Vorsprüngen. Insbesondere können beide Flanken der Schraffurrippen strukturiert sein, wobei sich die Struktur an der einen Flanke von jener an der anderen Flanke unterscheidet. Dabei können die dargestellten bzw. beschriebenen Varianten miteinander kombiniert werden, wobei auch die Querschnittsgestalt der Schraffurrippen unabhängig von den auf den seitlichen Flanken ausgebildeten Strukturen ist. Außerdem können die Flächen zwischen den Schraffurrippen ebenfalls strukturiert sein.The invention is not limited to the embodiment variants described. The structured lateral flank can be structured as desired, for example with projections running in the manner of a lattice. In particular, both flanks of the hatching ribs can be structured, with the structure on one flank differing from that on the other flank. The variants shown or described can be combined with one another, the cross-sectional shape of the hatching ribs also being independent of the structures formed on the lateral flanks. In addition, the areas between the hatch ribs can also be structured.

Bezugsziffernlistereference number list

11
Schraffurflächehatch area
2, 2', 2"2, 2', 2"
Schraffurrippehatch rib
3a, 3b3a, 3b
seitliche Flankelateral flank
3'3'
Plateauflächeplateau area
3'a, 3'b3'a, 3'b
seitliche Flankelateral flank
3"a, 3"b3"a, 3"b
seitliche Flankelateral flank
44
Strukturstructure
55
Vorsprunghead Start
66
Zusatzrippenextra ribs
a1a1
AbstandDistance
b1, b2, b3b1, b2, b3
BreiteBroad
h1, h2h1, h2
HöheHeight
α, β, γα, β, γ
Winkelangle

Claims (12)

  1. Pneumatic vehicle tyre having sidewalls and having at least one hatching area (1) or a hatched area element on at least one sidewall, wherein the hatching area (1) or the area element has a multiplicity of hatching ribs (2, 2', 2") running next to one another and having two lateral flanks (3a, 3'a, 3"a, 3b, 3'b, 3"b), wherein the one lateral flank (3a, 3'a, 3"a) of the hatching ribs (2, 2', 2") has a surface finish which differs from that on the other lateral flank (3b, 3'b, 3"b) of the hatching ribs (2, 2', 2"), and wherein the surface finish of at least one lateral flank (3a, 3'a, 3"a) of the hatching ribs (2, 2', 2") is a three-dimensional structure,
    characterized
    in that the three-dimensional structure covers the lateral flank (3a) of the respective hatching rib (2, 2', 2"), or
    in that the three-dimensional structure consists of a multiplicity of additional ribs (6) which run parallel to one another and at right angles to the extent of the hatching ribs (2) and which have a width (b2) at their base of in particular 0.1 mm to 0.5 mm.
  2. Pneumatic vehicle tyre according to Claim 1, characterized in that, when hatching ribs (2) running next to one another are viewed, the flank (3a, 3'a, 3"a) of the one hatching rib (2) with the one surface finish is facing the flank (3a, 3'a, 3"a) of the adjacent hatching rib (2) with the other surface finish.
  3. Pneumatic vehicle tyre according to Claim 1 or 2, characterized in that the surface finish of both lateral flanks (3a, 3'a, 3"a) of the hatching ribs (2, 2', 2") is a three-dimensional structure.
  4. Pneumatic vehicle tyre according to one of Claims 1 to 3, characterized in that the three-dimensional structure, which covers the lateral flank (3a) of the respective hatching rib (2, 2', 2"), consists of a multiplicity of elevations and depressions, which are preferably formed directly next to one another, having a height or depth of in particular 0.05 mm to 0.8 mm.
  5. Pneumatic vehicle tyre according to one of Claims 1 to 3, characterized in that the additional ribs (6) are at mutual distances from one another or directly adjoin one another.
  6. Pneumatic vehicle tyre according to one of Claims 1 to 3 or 5, characterized in that the additional ribs (6), viewed in cross section, are triangular, trapezoidal or round.
  7. Pneumatic vehicle tyre according to one of Claims 1, 2 or 4 to 6, characterized in that the one of the lateral flanks (3b, 3'b, 3"b) of the hatching ribs (2, 2', 2") in each case is a smooth surface free of structures.
  8. Pneumatic vehicle tyre according to one of Claims 1 to 7, characterized in that the hatching ribs (2, 2"), viewed in cross section, are triangular, in particular isosceles triangular.
  9. Pneumatic vehicle tyre according to one of Claims 1 to 7, characterized in that the hatching ribs (2, 2"), viewed in cross section, are trapezoidal, in particular isosceles trapezoidal.
  10. Pneumatic vehicle tyre according to Claim 8 or 9, characterized in that the lateral flanks (3a, 3'a, 3"a, 3b, 3'b, 3"b) of the hatching ribs (2, 2', 2") run, viewed in cross section, at an angle (a, β, γ) of 5° to 60°, in particular of at most 30°, in relation to the sidewall.
  11. Pneumatic vehicle tyre according to Claim 10, characterized in that the lateral flanks (3a, 3'a, 3"a, 3b, 3'b, 3"b) of the hatching ribs (2, 2', 2") run at different angles (β, γ) in relation to the sidewall, the larger angle (γ) being in particular 5° to 30° larger than the smaller one.
  12. Pneumatic vehicle tyre according to one of Claims 1 to 11, characterized in that hatching ribs (2) are provided which, at least in sections, run over local, in particular dome-like, preferably hemispherical, projections (5), which in particular have a height (h2) of 0.1 mm to 0.3 mm.
EP19701463.2A 2018-03-20 2019-01-14 Vehicle pneumatic tyre Active EP3768527B1 (en)

Applications Claiming Priority (2)

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DE102018204245.4A DE102018204245A1 (en) 2018-03-20 2018-03-20 Vehicle tires
PCT/EP2019/050747 WO2019179666A1 (en) 2018-03-20 2019-01-14 Vehicle pneumatic tyre

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EP3768527B1 true EP3768527B1 (en) 2022-05-18

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CN (1) CN111886142B (en)
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DE102019215726A1 (en) * 2019-10-14 2021-04-15 Continental Reifen Deutschland Gmbh Vehicle tire having a hatched area and method for producing a molding tool

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JP3903372B2 (en) * 2001-12-10 2007-04-11 横浜ゴム株式会社 Pneumatic tire
JP2004299662A (en) * 2003-03-19 2004-10-28 Yokohama Rubber Co Ltd:The Pneumatic tire
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FR2892336B1 (en) * 2005-10-21 2009-10-09 Michelin Soc Tech MARKING PROVIDES IMPROVED VISIBILITY AND MARKING METHOD.
JP4925803B2 (en) * 2006-12-04 2012-05-09 株式会社ブリヂストン tire
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CN111886142B (en) 2023-09-08
WO2019179666A1 (en) 2019-09-26
CN111886142A (en) 2020-11-03
US12005745B2 (en) 2024-06-11
EP3768527A1 (en) 2021-01-27
US20210016608A1 (en) 2021-01-21

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